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A few quick things I learned this year as a rookie SRT'er: Make sure you have your retrieval rope attached, particularly if your limb/notch/canopy height is going to be higher than your tether height. otherwise you're climbing up to attach it. Not the end of the world but easier before than after. I put a loop on the line right behind the knot/delta link and haven't (yet) had a problem getting my line loose and down easy. This is called the Climb of Shame. If you haven't done this several times while practicing or hunting, you're lying.
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If you're going to be using a throw bag, it's worth having a back up one and really worth having any of the slick lines for your throw bag. I used the one that came with mine from amazon for a bit and it was great, until it got a bit wet and didn't slide over bark very well. I carry just over 100' of dynaglide and a 14oz. (I think) throwball in a molle flashlight pouch which stays on my pack. That way, I'm not stuck with presets if I like a different spot better.
You can use your throw line in lots of creative ways to get your climbing line set. I use 40 feet of climbing line and have needed to use the throw line a few times since I was hooking branches or notches probably at or about 50'. I carried 50' this year and am going to 100' of C-IV next year. The reason being non-preset trees and the reason you mention. With 100' and assuming the line turns over a substantial limb, a base anchor solves going through multiple, smaller limbs making for a quicker and easier setup.
Plan on a little frustration from time to time. SRT is easy as pie in the practice yard--takes a bit of practice to set up efficiently, quietly, and in the dark.
I learned it's much better to pull the tag end up and over rather than the delta link and knot end the hard way and when I realized it was a total 'duh' moment. Exactly. The link or rigging ring should be the last thing that gets pulled up if using a canopy anchor.
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